<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" :key="item.id" v-for="item in menuList">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span v-text="item.authName"></span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" :key="subItem.id" v-for="subItem in item.children" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span v-text="subItem.authName"></span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>   

<script>
export default {
  data(){
    return{
      //左侧菜单数据
      menuList:[],
      iconsObj:{
        "125":'el-icon-user-solid',
        "103":'el-icon-box',
        "101":'el-icon-shopping-bag-2',
        "102":'el-icon-s-order',
        "145":'el-icon-s-marketing',
      },
      //是否折叠
      isCollapse:false,
      //被激活的链接地址
      activePath:'',
    }
  },
  created(){
    this.getMenuList();
    this.activePath=window.sessionStorage.getItem('activePath');
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有菜单
    async getMenuList(){
     const {data:res}=await this.$http.get('menus');
     if(res.meta.status!==200){
       return this.$message.error(res.meta.msg);
     }else{
       this.menuList=res.data
     }
    },
    //点击按钮，切换菜单折叠与展开
    toggleCollapse(){
        this.isCollapse= !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath=activePath;
    },

  },
}
</script>

<style  scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div {
  display: flex;
  align-items: center;
}
.el-header div span {
  margin-left: 15px;
}
.el-aside {
  background-color: #333744;
}
.el-aside .el-menu{
  border-right:none ;
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  height: 100%;
}
.el-button {
  height: 40px;
}
.toggle-button{
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>